[Amps] 3-500z amp homebrew question

[John Lemay]

Mike

If you did not understand the reason for that choke, do you think you should
be doing any work inside the amplifier ?

John G4ZTR

-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of Glen Zook
Sent: 12 February 2012 16:17
To: Mr Mike; amps at contesting.com
Subject: Re: [Amps] 3-500z amp homebrew question

The r.f. choke to ground is to prevent the B+ from flowing on the antenna if
the plate coupling capacitor shorts.

In normal operation, theoretically no current will flow.  When the coupling
capacitor shorts, a LOT of current will flow.
 
Glen, K9STH


Website:  http://k9sth.com


________________________________
 From: Mr Mike <kf8zn at yahoo.com>
To: "amps at contesting.com" <amps at contesting.com> 
Sent: Sunday, February 12, 2012 9:39 AM
Subject: [Amps] 3-500z amp homebrew question
 
Hello!
Mike, AC2Q, here.
I am in the process of De-Re-Homebrewing a 6 meter single 3-500z amp I
required. In short I doubt it ever worked well, and while it would look good
schematically, the construction techniques were horrid.
 
My QUESTION is regarding the RFC that is downstream of the output network,
what is it's purpose? And what sort of current would it be carrying?
 
"Typically" in HF amps, it has a value of 2.5mH.
 
Any helpful input appreciated.
 
Mike
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